Unity Technologies

This is most probably happening because of lower quality sample rate conversion (Read: Linear).
In Everyplay you can use setAudioResamplerQuality(1), to get better conversion which of course will be more CPU intensive.

There is also option to force Unity to use 44.1khz 16bit audio in Edit/Project Settings/Audio - System Sample Rate.
It defaults to 0, which chooses whatever device reports back as it's native sample rate.

This is most probably happening because of lower quality sample rate conversion (Read: Linear).
In Everyplay you can use setAudioResamplerQuality(1), to get better conversion which of course will be more CPU intensive.

There is also option to force Unity to use 44.1khz 16bit audio in Edit/Project Settings/Audio - System Sample Rate.
It defaults to 0, which chooses whatever device reports back as it's native sample rate.